Sunday, July 22, 2007

Slightly OT- Global Warming

Global average temperatures (source: NCDC)

On global warming, Tyler likes to characterise himself as an agnostic. Which means he can see the planet is warming, but is unconvinced anyone really understands why.

But for the last couple of Sundays the inestimable Mr Booker has referenced a chart which apparently shows warming has stopped. This week he says:

"A graph of satellite data from the National Oceanic and Atmospheric Administration shows that, over the past eight years, average global temperatures have flattened out well below their peak in 1998. The 2007 figures to June show a dip to a level first reached in 1983, 24 years ago."

On a weekend when most of England is underwater, and the cry for more Big Government action is getting louder, that's very interesting. I want to believe it. So I've just tried to find the chart.

Unfortunately, all I can come up with is this page from the US National Climatic Data Center, drawing on the NOAA satellite data. It includes this chart:

What it shows is that sea surface temperatures are indeed down- 2007 ytd is only the sixth warmest year ever. But land temperatures are up- 2007 ytd is numero uno, the warmest on record.

Highly inconvenient.

Have I missed something?

Does anyone know?

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